1993 GMC Suburban Owner's Manual - Page 272

Fuek h Foreign Countries If you plan ondriving in anothercountryoutsidethe U.S. orCanada, unleadedfuel may behard to find. Do notuseleadedgasoline. If youuse even one tank full, your emission controls won't work well or at all. With continuoususe,sparkplugscangetfouled,theexhaustsystem can corrode, and yourengine oil candeterioratequickly. Your vehicle'sthree-waycatalytic converter and oxygensensorwill be damaged. All of thatmeanscostly repairsthatwouldn'tbecovered by yourwarranty. To checkonfuelavailability,ask an autoclub, or contactamajoroil companythatdoesbusinessinthecountrywhereyou'llbedriving. You canalsowriteusatthefollowingaddressforadvice.Just you'regoingandgiveyourVehicleIdentificationNumber(VIN). GeneralMotors of Canada Ltd. International Export Sales PostOffice Box 828 Oshawa,Ontario LIH 7N1, Canada tell uswhere PO494 Thefuelcap is behind ahingeddoor on theleftside of yourvehicle. To take off thecap, turn itslowly to theleft(counterclockwise). 6-6